If we are to stand any chance of tackling the worst excesses of climate change,we need to switch rapidly to a low carbon economy.This means generating our electricity from renewable means, rather than from fossil fuels.The most obvious sources of renewable energy are wind power, solar power and wave power.We need to invest heavily in these,at the same time as putting a pricing tariff on carbon generated power that will make renewable energy price comparable if not cheaper than generating energy from traditional means.